Check out these fracturing facts from the U.S. Dept of Energy, which might give some insight into the [lack of] regulations related to natural gas extraction:
21 out of 31 of the states which employ hydraulic fracturing for
natural gas drilling have no regulations specific to the practice
only 4 out of 31 drilling states have detailed regulations
regarding hydraulic fracturing
only 10 states require that fracturing companies disclose
information on the chemicals they are using
0 states require that the volume of fluid left
underground for fracturing be recorded
Sources: State Oil and Natural Gas Regulations Designed to Protect Water Resources, May 2009, U.S. Department of Energy, office of Fossil Energy, National Energy Technology Lab, and the Ground Water Protection Council.
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